Jan 07, 2017 - May 22, 2019
| Name | First Seen |
|---|
| Name | First Seen | Last Seen |
|---|---|---|
| ns1.vigorlearning.com | Jan 10, 2019 | May 22, 2019 |
| ns2.vigorlearning.com | Jan 10, 2019 | May 22, 2019 |
| ns1.instanceworld.com | Jan 07, 2017 | Feb 25, 2017 |
| ns2.instanceworld.com | Jan 07, 2017 | Feb 25, 2017 |